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

tldr/ledger

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+---
+syntax: markdown
+tags: [tldr, common]
+source: https://github.com/tldr-pages/tldr.git
+---
+# ledger
+
+> A powerful, double-entry accounting system.
+> More information: <https://www.ledger-cli.org>.
+
+- Print a balance report showing totals:
+
+`ledger balance --file {{path/to/ledger.journal}}`
+
+- List all postings in Expenses ordered by amount:
+
+`ledger register {{expenses}} --sorted {{amount}}`
+
+- Print total Expenses other than Drinks and Food:
+
+`ledger balance {{Expenses}} and not ({{Drinks}} or {{Food}})`
+
+- Print a budget report:
+
+`ledger budget`
+
+- Print summary information about all the postings:
+
+`ledger stats`