Move pages under tldr, lint run.sh, update docs

tldr/clangd

@@ -0,0 +1,22 @@
+---
+syntax: markdown
+tags: [tldr, common]
+source: https://github.com/tldr-pages/tldr.git
+---
+# clangd
+
+> Language server that provides IDE-like features to editors.
+> It should be used via an editor plugin rather than invoked directly.
+> More information: <https://clangd.llvm.org/>.
+
+- Display available options:
+
+`clangd --help`
+
+- List of available options:
+
+`clangd --help-list`
+
+- Display version:
+
+`clangd --version`