declare, local, typeset: add pages (#7529)

pages/common/declare.md

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+# declare
+
+> Declare variables and give them attributes.
+> More information: <https://www.gnu.org/software/bash/manual/bash.html#Bash-Builtins>.
+
+- Declare a string variable with the specified value:
+
+`declare {{variable}}="{{value}}"`
+
+- Declare an integer variable with the specified value:
+
+`declare -i {{variable}}="{{value}}"`
+
+- Declare an array variable with the specified value:
+
+`declare {{variable}}=({{item_a item_b item_c}})`
+
+- Declare an associative array variable with the specified value:
+
+`declare -A {{variable}}=({{[key_a]=item_a [key_b]=item_b [key_c]=item_c}})`
+
+- Declare a readonly string variable with the specified value:
+
+`declare -r {{variable}}="{{value}}"`
+
+- Declare a global variable within a function with the specified value:
+
+`declare -g {{variable}}="{{value}}"`

pages/common/local.md

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+# local
+
+> Declare local variables and give them attributes.
+> More information: <https://www.gnu.org/software/bash/manual/bash.html#Bash-Builtins>.
+
+- Declare a string variable with the specified value:
+
+`local {{variable}}="{{value}}"`
+
+- Declare an integer variable with the specified value:
+
+`local -i {{variable}}="{{value}}"`
+
+- Declare an array variable with the specified value:
+
+`local {{variable}}=({{item_a item_b item_c}})`
+
+- Declare an associative array variable with the specified value:
+
+`local -A {{variable}}=({{[key_a]=item_a [key_b]=item_b [key_c]=item_c}})`
+
+- Declare a readonly variable with the specified value:
+
+`local -r {{variable}}="{{value}}"`

pages/common/typeset.md

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+# typeset
+
+> Declare variables and give them attributes.
+> More information: <https://www.gnu.org/software/bash/manual/bash.html#Bash-Builtins>.
+
+- Declare a string variable with the specified value:
+
+`typeset {{variable}}="{{value}}"`
+
+- Declare an integer variable with the specified value:
+
+`typeset -i {{variable}}="{{value}}"`
+
+- Declare an array variable with the specified value:
+
+`typeset {{variable}}=({{item_a item_b item_c}})`
+
+- Declare an associative array variable with the specified value:
+
+`typeset -A {{variable}}=({{[key_a]=item_a [key_b]=item_b [key_c]=item_c}})`
+
+- Declare a readonly variable with the specified value:
+
+`typeset -r {{variable}}="{{value}}"`
+
+- Declare a global variable within a function with the specified value:
+
+`typeset -g {{variable}}="{{value}}"`