graphviz filter commands: add pages (#6401)

pages/common/bcomps.md

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+# bcomps
+
+> Decompose graphs into their biconnected components.
+> Graphviz filters: `acyclic`, `bcomps`, `comps`, `edgepaint`, `gvcolor`, `gvpack`, `mingle`, `nop`, `sccmap`, `tred`, & `unflatten`.
+> More information: <https://graphviz.org/pdf/bcomps.1.pdf>.
+
+- Decompose one or more graphs into their biconnected components:
+
+`bcomps {{path/to/input1.gv}} {{path/to/input2.gv ...}} > {{path/to/output.gv}}`
+
+- Print the number of blocks and cutvertices in one or more graphs:
+
+`bcomps -v -s {{path/to/input1.gv}} {{path/to/input2.gv ...}}`
+
+- Write each block and block-cutvertex tree to multiple numbered filenames based on `output.gv`:
+
+`bcomps -x -o {{path/to/output.gv}} {{path/to/input1.gv}} {{path/to/input2.gv ...}}`
+
+- Display help for `bcomps`:
+
+`bcomps -?`