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

tldr/llvm-cat

@@ -0,0 +1,13 @@
+---
+syntax: markdown
+tags: [tldr, common]
+source: https://github.com/tldr-pages/tldr.git
+---
+# llvm-cat
+
+> Concatenate LLVM Bitcode (`.bc`) files.
+> More information: <https://github.com/llvm/llvm-project/blob/main/llvm/tools/llvm-cat/llvm-cat.cpp>.
+
+- Concatenate Bitcode files:
+
+`llvm-cat {{path/to/file1.bc}} {{path/to/file2.bc}} -o {{path/to/out.bc}}`