Prepare main to become new default branch (#9095)

* Update Makefile with changes from #7372

Signed-off-by: Thane Thomson <connect@thanethomson.com>

* Sync main GitHub config with master and update

Signed-off-by: Thane Thomson <connect@thanethomson.com>

* Remove unnecesary dot folders

Signed-off-by: Thane Thomson <connect@thanethomson.com>

* Sync dotfiles

Signed-off-by: Thane Thomson <connect@thanethomson.com>

* Remove unused Jepsen tests for now

Signed-off-by: Thane Thomson <connect@thanethomson.com>

* tools: remove k8s (#6625)

Remove mintnet as discussed on team call.

closes #1941

* Restore nightly fuzz testing of P2P addrbook and pex

Signed-off-by: Thane Thomson <connect@thanethomson.com>

* Fix YAML lints

Signed-off-by: Thane Thomson <connect@thanethomson.com>

* Fix YAML formatting nits

Signed-off-by: Thane Thomson <connect@thanethomson.com>

* More YAML nits

Signed-off-by: Thane Thomson <connect@thanethomson.com>

* github: fix linter configuration errors and occluded errors (#6400)

* Minor fixes to OpenAPI spec to sync with structs on main

Signed-off-by: Thane Thomson <connect@thanethomson.com>

* Remove .github/auto-comment.yml - does not appear to be used

Signed-off-by: Thane Thomson <connect@thanethomson.com>

* Add issue config with link to discussions

Signed-off-by: Thane Thomson <connect@thanethomson.com>

* Adjust issue/PR templates to suit current process

Signed-off-by: Thane Thomson <connect@thanethomson.com>

* Remove unused RC branch config from release workflow

Signed-off-by: Thane Thomson <connect@thanethomson.com>

* Fix wildcard matching in build jobs config

Signed-off-by: Thane Thomson <connect@thanethomson.com>

* Document markdownlint config

Signed-off-by: Thane Thomson <connect@thanethomson.com>

* Restore manual E2E test group config

Signed-off-by: Thane Thomson <connect@thanethomson.com>

* Document linter workflow with local execution instructions

Signed-off-by: Thane Thomson <connect@thanethomson.com>

* Document and fix minor nit in Super-Linter markdownlint config

Signed-off-by: Thane Thomson <connect@thanethomson.com>

* Update .github/ISSUE_TEMPLATE/bug-report.md

Co-authored-by: William Banfield <4561443+williambanfield@users.noreply.github.com>

* Apply suggestions from code review

Co-authored-by: William Banfield <4561443+williambanfield@users.noreply.github.com>

* Update pull request template to add language around discussions/issues

Signed-off-by: Thane Thomson <connect@thanethomson.com>

* .golangci.yml: Deleted commented-out lines

Signed-off-by: Thane Thomson <connect@thanethomson.com>

* ci: Drop "-2" from e2e-nightly-fail workflow

Signed-off-by: Thane Thomson <connect@thanethomson.com>

* Address triviality concern in PR template

Signed-off-by: Thane Thomson <connect@thanethomson.com>

Co-authored-by: Marko <marbar3778@yahoo.com>
Co-authored-by: Sam Kleinman <garen@tychoish.com>
Co-authored-by: William Banfield <4561443+williambanfield@users.noreply.github.com>

.github/workflows/markdown-links.yml

@@ -0,0 +1,23 @@
+name: Check Markdown links
+
+on:
+  push:
+    branches:
+      - main
+  pull_request:
+    branches: [main]
+
+jobs:
+  markdown-link-check:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v3
+      - uses: technote-space/get-diff-action@v6
+        with:
+          PATTERNS: |
+            **/**.md
+      - uses: creachadair/github-action-markdown-link-check@master
+        with:
+          check-modified-files-only: 'yes'
+          config-file: '.md-link-check.json'
+        if: env.GIT_DIFF