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

tldr/ical

@@ -0,0 +1,21 @@
+---
+syntax: markdown
+tags: [tldr, common]
+source: https://github.com/tldr-pages/tldr.git
+---
+# ical
+
+> A Hirji/Islamic calendar and converter for the terminal.
+> More information: <https://manned.org/ical>.
+
+- Display the current month's calendar:
+
+`ical`
+
+- Convert a Gregorian date to a Hijri date:
+
+`ical --gregorian {{yyyymmdd}}`
+
+- Convert a Hirji date to a Gregorian date:
+
+`ical --hijri {{yyyymmdd}}`