bitwise: add page (#4289)

pages/linux/bitwise.md

@@ -0,0 +1,20 @@
+# bitwise
+
+> Multi base interactive calculator supporting dynamic base conversion and bit manipulation.
+> More information: <https://github.com/mellowcandle/bitwise>.
+
+- Run using interactive mode:
+
+`bitwise`
+
+- Convert from decimal:
+
+`bitwise {{12345}}`
+
+- Convert from hexadecimal:
+
+`bitwise {{0x563d}}`
+
+- Convert a C-style calculation:
+
+`bitwise  {{"0x123 + 0x20 - 30 / 50"}}`