feat: check all the link & fragments (#127)

Some 404 images are removed since I don't know what they are referring
to. cc @gaocegege

Notes:

- `lychee` cannot check the fragments that are generated by running JS
- Some special characters in the header will not be recognized, it's
better to specify the fragment manually like `## my: special.header
{#use-this-as-fragment}` cc @cutecutecat
- https://docs.gitlab.com/user/markdown/#heading-ids-and-links there is
no standard

---------

Signed-off-by: Keming <[email protected]>

Author: kemingy

.github/workflows/check.yml

@@ -1,4 +1,4 @@
-name: Typos check
+name: Check Typos and Links
 
 on:
   push:
@@ -10,11 +10,21 @@ on:
 
 jobs:
   run:
-    name: Spell Check with Typos
+    name: Check Typos and Links
     runs-on: ubuntu-latest
     steps:
     - name: Checkout Actions Repository
       uses: actions/checkout@v4
 
     - name: Check spelling of file.txt
       uses: crate-ci/typos@master
+
+    - name: Link Checker
+      uses: lycheeverse/lychee-action@v2
+      with:
+        # exclude the blog since runner IPs are almost always blocked by HashNode
+        args: --max-concurrency 8 --verbose --no-progress --exclude '^https://blog\.vectorchord\.ai' .
+        fail: true
+        format: markdown
+        jobSummary: true
+        lycheeVersion: nightly

lychee.toml

@@ -0,0 +1,16 @@
+fallback_extensions = ["md"]
+user_agent = "curl/8.1.2"
+include_fragments = true
+accept = [
+    200,
+    403,  # forbidden, mainly for OpenAI
+    999,  # LinkedIn
+]
+remap = [
+    "(https://github.com/[^/]+/[^/]+/blob/[^#]+)#[a-zA-Z0-9._-]* $1",  # remove fragment from GitHub **blob** URLS
+    "(https://github.com/[^/]+/[^/]+/tree/[^#]+)#[a-zA-Z0-9._-]* $1",  # remove fragment from GitHub **main** URLS
+    # `rewrites` from the `.vitepress/config.mts` file
+    "([\\w]+)/vectorchord/usage/external-index-precomputation $1/vectorchord/usage/external-build",
+    "([\\w]+)/vectorchord/usage/range-query $1/vectorchord/usage/similarity-filter",
+    "([\\w]+)/vectorchord/usage/indexing-with-maxsim-operators $1/vectorchord/usage/multi-vector-retrieval",
+]