feat: Generate admin command documentation

The first part of getting admin command docs on the website.

Next is is including it in the same way we do the example config or
readme.

There's also the beginnings of manpage generation here, although it's
kinda sus and I'm not sure how it's supposed to work. I'll leave that to
anyone who wants to package it.

We introduce the beginings of the xtask pattern here - we do a lot of
file generation, I thought it would be best to avoid doing that on every
compilation. It also helps avoid lots of runtime deps.

We'll need to document generating this stuff & probably add pre-commit
hooks for it, though.

Cargo.lock

@@ -47,12 +47,56 @@ dependencies = [
  "alloc-no-stdlib",
 ]
 
+[[package]]
+name = "anstream"
+version = "0.6.18"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "8acc5369981196006228e28809f761875c0327210a891e941f4c683b3a99529b"
+dependencies = [
+ "anstyle",
+ "anstyle-parse",
+ "anstyle-query",
+ "anstyle-wincon",
+ "colorchoice",
+ "is_terminal_polyfill",
+ "utf8parse",
+]
+
 [[package]]
 name = "anstyle"
 version = "1.0.10"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "55cc3b69f167a1ef2e161439aa98aed94e6028e5f9a59be9a6ffb47aef1651f9"
 
+[[package]]
+name = "anstyle-parse"
+version = "0.2.6"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "3b2d16507662817a6a20a9ea92df6652ee4f94f914589377d69f3b21bc5798a9"
+dependencies = [
+ "utf8parse",
+]
+
+[[package]]
+name = "anstyle-query"
+version = "1.1.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "79947af37f4177cfead1110013d678905c37501914fba0efea834c3fe9a8d60c"
+dependencies = [
+ "windows-sys 0.59.0",
+]
+
+[[package]]
+name = "anstyle-wincon"
+version = "3.0.8"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "6680de5231bd6ee4c6191b8a1325daa282b415391ec9d3a37bd34f2060dc73fa"
+dependencies = [
+ "anstyle",
+ "once_cell_polyfill",
+ "windows-sys 0.59.0",
+]
+
 [[package]]
 name = "anyhow"
 version = "1.0.98"
@@ -717,14 +761,25 @@ dependencies = [
  "clap_derive",
 ]
 
+[[package]]
+name = "clap-markdown"
+version = "0.1.5"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "d2a2617956a06d4885b490697b5307ebb09fec10b088afc18c81762d848c2339"
+dependencies = [
+ "clap",
+]
+
 [[package]]
 name = "clap_builder"
 version = "4.5.38"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "379026ff283facf611b0ea629334361c4211d1b12ee01024eec1591133b04120"
 dependencies = [
+ "anstream",
  "anstyle",
  "clap_lex",
+ "strsim",
 ]
 
 [[package]]
@@ -745,6 +800,16 @@ version = "0.7.4"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "f46ad14479a25103f283c0f10005961cf086d8dc42205bb44c46ac563475dca6"
 
+[[package]]
+name = "clap_mangen"
+version = "0.2.26"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "724842fa9b144f9b89b3f3d371a89f3455eea660361d13a554f68f8ae5d6c13a"
+dependencies = [
+ "clap",
+ "roff",
+]
+
 [[package]]
 name = "cmake"
 version = "0.1.54"
@@ -760,6 +825,12 @@ version = "1.1.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "3d7b894f5411737b7867f4827955924d7c254fc9f4d91a6aad6b097804b1018b"
 
+[[package]]
+name = "colorchoice"
+version = "1.0.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "5b63caa9aa9397e2d9480a9b13673856c78d8ac123288526c37d7839f2a86990"
+
 [[package]]
 name = "concurrent-queue"
 version = "2.5.0"
@@ -2335,6 +2406,12 @@ version = "2.11.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "469fb0b9cefa57e3ef31275ee7cacb78f2fdca44e4765491884a2b119d4eb130"
 
+[[package]]
+name = "is_terminal_polyfill"
+version = "1.70.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "7943c866cc5cd64cbc25b2e01621d07fa8eb2a1a23160ee81ce38704e97b8ecf"
+
 [[package]]
 name = "itertools"
 version = "0.12.1"
@@ -2925,6 +3002,12 @@ dependencies = [
  "portable-atomic",
 ]
 
+[[package]]
+name = "once_cell_polyfill"
+version = "1.70.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "a4895175b425cb1f87721b59f0f286c2092bd4af812243672510e1ac53e2e0ad"
+
 [[package]]
 name = "openssl-probe"
 version = "0.1.6"
@@ -3693,6 +3776,12 @@ dependencies = [
  "windows-sys 0.52.0",
 ]
 
+[[package]]
+name = "roff"
+version = "0.2.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "88f8660c1ff60292143c98d08fc6e2f654d722db50410e3f3797d40baaf9d8f3"
+
 [[package]]
 name = "ruma"
 version = "0.10.1"
@@ -4525,6 +4614,12 @@ dependencies = [
  "quote",
 ]
 
+[[package]]
+name = "strsim"
+version = "0.11.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "7da8b5736845d9f2fcb837ea5d9e2628564b3b043a70948a3f0b778838c5fb4f"
+
 [[package]]
 name = "subslice"
 version = "0.2.3"
@@ -5256,6 +5351,12 @@ version = "1.0.4"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "b6c140620e7ffbb22c2dee59cafe6084a59b5ffc27a8859a5f0d494b5d52b6be"
 
+[[package]]
+name = "utf8parse"
+version = "0.2.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "06abde3611657adf66d383f00b093d7faecc7fa57071cce2578660c9f1010821"
+
 [[package]]
 name = "uuid"
 version = "1.16.0"
@@ -5855,6 +5956,26 @@ dependencies = [
  "markup5ever",
 ]
 
+[[package]]
+name = "xtask"
+version = "0.5.0-rc.5"
+dependencies = [
+ "clap",
+ "serde",
+ "serde_json",
+]
+
+[[package]]
+name = "xtask-admin-command"
+version = "0.5.0-rc.5"
+dependencies = [
+ "clap-markdown",
+ "clap_builder",
+ "clap_mangen",
+ "conduwuit",
+ "conduwuit_admin",
+]
+
 [[package]]
 name = "yansi"
 version = "1.0.1"