Update cheatsheets

tldr/hledger-import

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+---
+syntax: markdown
+tags: [tldr, common]
+source: https://github.com/tldr-pages/tldr.git
+---
+# hledger import
+
+> Import new transactions from one or more data files to the main journal.
+> More information: <https://hledger.org/hledger.html#import>.
+
+- Import new transactions from `bank.csv`, using `bank.csv.rules` to convert:
+
+`hledger import {{path/to/bank.csv}}`
+
+- Show what would be imported from these two files, without doing anything:
+
+`hledger import {{path/to/bank1.csv}} {{path/to/bank2.csv}} --dry-run`
+
+- Import new transactions from all CSV files, using the same rules for all:
+
+`hledger import --rules-file {{common.rules}} *.csv`
+
+- Show conversion errors or results while editing `bank.csv.rules`:
+
+`watchexec -- hledger -f {{path/to/bank.csv}} print`
+
+- Mark `bank.csv`'s current data as seen, as if already imported:
+
+`hledger import --catchup {{path/to/bank.csv}}`
+
+- Mark `bank.csv` as all new, as if not yet imported:
+
+`rm -f .latest.bank.csv`